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Letters Patent No. 77,557, dated May 5, 1868.

IMPROVEMENT INWINDM'ILLS.

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Be it known that I, JOHN A. WHEELER, of Freeborn, in the county of Freeborn, and State of Minnesota, have invented a new and improved Windmill; andfI do hereby declare that the following is a full, clear, and exact description' thereof, which will enable others skilled inthe art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in whichi Figure 1 represents a front view of my improved windmill.

Figure 2 is a longitudinal'vertical section of the same, taken on the plane of the line :I: x, fig. 1.

Similar letters of reference indicate corresponding parts.

T his invention relates to a new manner offhanging sectional sails in the frame [of a windmill, and consists chiefly in the use of additional arms, which, in connection with'the radial arms projecting from theshafaserve as supports for the sectional sails, so that the same can be pivot'ed at right angl-es' to the said radial arms, whereby the adjusting of the sails is greatly facilitated.

The invention also consists in the general arrangement and combination of devices for obtainingv uniform motion and satisfactory results.

A, in the drawing, represents the horizontal shaft, which has its hearings in a disk or' ring, B, that restsI upon and turns loose on a suitable support, C, and that carries a vane, D, .as-shown.

On the outer end of the shaft A is mounted a hnb, E, from' the rini of which a suitable number of radial arms, F F, project. The arms F F are connected near their outer ends by means ofband-rods G G, that are parallel to the tangentsof the radii, which are equidistant between the respective pair offarms F.

Nearer to the hub, the arms F are connected by another set of band-rods, H H, which are parallel to the lrods G, between each respective pair of arms F. On thc'rods G H are fitted a pair of adjustable eyebolts, N N,Ibetween each pair of arms F, which bolts carry atthcir rear ends .arms I I, which, in conjunction with the arms F, serve to hold the sectional sails J J, as is clearly shown vin iig. l.

Each sail consists of two or more sections, and ea'ch section is, by means of pins a a, pivoted between the arms F I. These pins are at right angles with the arms F, inl which they have their bearings, and therefore not parallel with the band-rods G H. From that edge of eachsectional sail which is nearest to the arm F to which the said sail is attached, projects forwarda lug or ear, to the front end of which an eye, e, is pivoted, as shown in iig. 2. As the pins a are at right angles to the arm F, the edges near the said arm are in line, and therefore the lugs b and eyes c of each set of sails will be in line with each other, so that a rod, K, can be fitted through the said eyes of one set, in which it is clamped by means of set-screws d, or their equivalents, as shown in iig. 2.

` The inner end of each rodK is or may be pivotcd'to a bell-crank,f, .which is hinged at its right angle to a cross, g, attached infront of the hub, while its other arm is, by means of a rod, It, connected with a sleeve, z,

sliding on the shaft A, which sleeve can, by means.- of a lever, L, be moved forward or backward; thereby the sails can be adjusted so as to regulate the power of the mill', orto altogether stop the motion of the same. Thus, by means of the false arms II, the sectional sails can be so hung as to'be, inthe aforesaid simple manner, connected with `the sliding sleeve, whereby the position of .thesails is adjusted.

Having thus described my invention, what I claim as ncw,and desire to secure by Letters Patent, is-

1. The false arms IV I, secured by means of adjustable eye-bolts N N to the band-rods Gr H, so that the sectional sails JJ can be pivotedbctween'the radial arms F F andthe false arms I I, all arranged substantially as herein shown and described.

2. v'lhe rods K, eyes e, and lugs b, in combination with the sectional sails J J, false arms I I, eyeb olts N N, 4

hand-rods G H, and radial'arms F, all arranged and operating substantially as herein shown and described.

The above specification of my invention signed by me, this 25th day of February, 1868.

JOHN A. WHEELER. Witnesses:

WM. F. McNAMARA,

ALEX. F. ROBERTS. 

